Year Cases per 100,000 1990 46.02 1991 45.92 1992 45.83 1993 45.74 1994 45.66 1995 45.59 1996 45.18 1997 44.79 1998 44.41 1999 44.05 2000 43.7 2001 42.92 2002 42.17 2003 41.43 2004 40.72 2005 40.03 2006 39.64 2007 39.28 2008 38.93 2009 38.6 2010 38.28 2011 38.28 2012 38.3 2013 38.32 2014 38.33 2015 38.35 2016 38.38